I've done the update, but the "Noise control with one earbud" works only with the right ear bud, and I have to put both ear buds then to remove the left one to run it on the right bud. Is it the same for you?
For me it works with both the earbuds. Whether it's the left or right used individually or together, while receiving a call, ambient noise will turn on automatically.
Something is wrong with mine, I even tried resetting my buds, still the same, now even the right bud doesn't work, I have to use both buds during calls and music streaming to have noise canceling and ambient sound, If use one individually it will ask me to use both buds to turn back the feature
